Question: Why do all transactions that have [commit, T] entries in the log before a [checkpoint] entries do not need to have WRITE operations redone in

Why do all transactions that have [commit, T] entries in the log before a [checkpoint] entries do not need to have WRITE operations redone in case of a system crash?[

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

Figure 22.6 shows the log corresponding to a particular schedule at the point of a system crash for four transactions T 1 , T 2 , T 3 , and T 4 . Suppose that we use the immediate update protocol...

Suppose that we use the deferred update protocol for the example in Figure 22.6. Show how the log would be different in the case of deferred update by removing the unnecessary log entries; then...

Hello this quesion is related to Database Management Please don't answer with your handwriting thank you Consider the following four transactions . Transaction T1: read item(A); read item(D); write...

Hi I need someone to solve me this question 2. Let the log contain the sequence of records: [start_transaction, T1] [write_item, T1,A,950] [write_item, T1,B ,2050] [start_transaction, T3]...

Consider the following four transactions: *Transaction T1: read_item(A); read_item(D); write_item(D); *Transaction T2: read_item(B); write_item(B); read_item(D); write_item(D); *Transaction T3:...

QUESTION B3. [PROFICIENT/ADVANCED (9 marks) How does the recovery manager ensure that atomicity and durability of transactions survive a system crash? (b) (3 marks) Assume that immediate update...

Append logs in recovery. Justify the answer. Start T1 Read T1, A Read T1, D Write T1, D, 20, 25 Commit T1 Checkpoint Start T2 Read T2, B Write T2, B, 12, 18 Start, T4 Read T4, D Write T4, D, 25, 15...

T . Question 3.2 (3 marks) Given the timeline graph shown in Figure 6.3b and assuming that the system uses the immediate update protocol with checkpointing, describe the recovery process from the...

can any expert help me with the below assignment just only 2 questions ,please read the requirment word by word and be careful about the style of the reference(APA) , file 3.1 is for question...

Beacon Company maintains and repairs warnings lights, such as those found on radio towers and lighthouses. Beacon Company prepared the end-of-period spreadsheet shown on the next page at October 31,...

(a) How many years will it take for $7500 to accumulate to $9517.39 at 3% compounded semi-annually? (b) Over what period of time will money triple at 9% compounded quarterly? (c) How many years will...

Item 2 8 points eBook Print References Check my workCheck My Work button is now disabled Item 2 In terms of total value, the most significant liability ( ies ) of U . S . nonfinancial businesses in 2...

Discuss the role of total quality management ( TQM ) in enhancing organizational effectiveness and customer satisfaction, outlining its fundamental principles and strategic implications.

With the previous strategy (#1) in your mind, think about your own group memberships and how they affect your verbal and nonverbal communication style. When you are interacting with people from...

What are some of the groups to which you would like to belong but do not?

How does society perceive the groups to which you belong? Favorably or unfavorably? In other words, by virtue of your membership in these groups, how are you treated by others?